Belt-tightening device



H. KOCOUREK BELT TIGHTEMNG DEVICE- original Filed May 5,

Patented Sept. 2, 1924.

lUnirse s'r-A'rss HENRY KOCOUREK, 0F CIIIGAGO, ILLINOIS, A-SSIGNOR T0 CHICAGO FLEXIBLE SHAFT COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION OIF ILLINOIS.

BELT-Trennwand :envien x Original application led May 5, 1919, Serial No. 294,828. Divided and this application filed February l" 12, 1920, Serial No. 358,236. Renewed April 30, 1923.

To all whom it may concern.:

'Be it known that 1HENnY KocoURnK, a citizen of the United States, and a. resident of the city of Chicago, in the county of Cook and the State of illinois, have invented certain new and useful Improvements in Belt-Tightening Devices, of which the following is a specification, reference being had to the accompanying drawings, forming a. part thereof.

This application is a division of my application No. 294,828, filed May 5th, 1919. The invention of this application relates to means for mounting the bearings for beltconnected driving and driven pulleys fo-r tightening and slackenin the belt. It consists in the elements an features of construction shown and described, as indicated in the claims.

1n the drawings:-

Figure 1 is a. side elevation of a belt transmission device embodying this invention.

Figure 2 is a top plan view of the same.'

Figure 3 is a section at the line, 3--3, on Figure 2.

Figure 4 is a section at the line, 44, on Figure 1.

r1he construction shown in the drawings may be understood as associated with a power shaft or so-called line shaft, indicated at 1. The journal bearings for this shaft are mounted upon a bracket, 2, which is formed with lugs or flanges, 3, having slots,v3, through whichsecuring screws, 1, extend into any suitable frame member, such as the vertical post, W, shown in the drawings, or a horizontal member if more convenient. A bearing sleeve, 1, for the line shaft, 1,l is formed with a spherical portion, 1", which is in a block, 5, and retained by a cap, 6, said block and cap being slidably adjustable upon the face, 7,

of the bracket, 2, and being retained in' adjusted position for proper alignment of the shaft, 1, by means of clamping bolts, 9, extending through slots, 8, in the part, 7,

v the heads of such bolts having been entered into said slots through an enlargement, 10, at one end thereof.' A driving wheel, 11, secured to the shaft, 1, transmits power through a belt, 12, to a dri-ven shaft on which in the structure shown are a fast pulley, 14, and a loose pulley, 15, with which and the belt, 12, are associated means for shifting to engage the belt within the fast or loose pulley; but these belt-shifting devices arethe subject matter of my said applicationv No. 294,828,.and are not to be described or claimed herein. Sleeves, 13, 13, which are the bearings for the shaft or shafts of the pulle s, 14 and 15, are carried in supports, 18 an 19, connected in a single frame casting by arms, 20, and the adjacenty part, 19. A. flat vertical arm, 21, extends for clamping Iby means of screws, 22, to the extending arm, 23, of the bracket, 2, having a slot, 2-1, in which the screws, 22, are slidably adjustable toward and from the line shaft, l, for obtaining proper tension of the belt, 12. The member, 21, is formed witha rib portion, 25, engaging the slot, 24, to: relieve the screws, 22, of an twisting strain on the member, and an adjusting screw, 26, engaging a lug, 27, on said member, 21, bearing upon a corresponding lug, 29, extending from the arm, 23, serves for drawing the member, 21, away from the shaft, 1, against Ithe tension of the belt in making the nal adjustment. (See Figure 2.)

The need for or advantage of roviding for adjustment of the bearings ofp both the driving and the driven pulleys may be understood upon considering that the bracket, 2, being mounted upon an available support as the post, W, the bearing of the shaft, 1, must be free to accommodate itself to the line shaft for properly aligning the latter, and that the shaft being in a position in the bearing, and the bearing having come to its proper position on the bracket and the bracket having come to proper position on the post to align the shaft, said bearing and bracket' will be secured in those positions by the clam ing `bolts as described. The necessity for a igning the line shaft creates the necessity for the adjustability of the bearings of' that shaft on the bracket. lit is then necessary to adjust the bearings of the driven shaft to properly take up the slack of thev belt or accommodate the position of the driven shaft to the limited length of thel belt; and for this purpose the-adjustment of the bearings of the driven shaft on the bracket as described is necessa 1n actually taking up the slack of the belt after the bracket has been adjusted on the post, and the bearings 'of the line shaft adju'sted on the bracket to properly align the shaft, obviouslv only the bearings of the driven shaft will be adjusted on the bracket.

I claim 1. In combinationv with aline shaft, a driving pulley thereon and a fixed support adjacent the shaft, a bearing for said shaft and a bracket to carry said bearing adjacent the driving pulley adapted to be mounted on said fixed support, and having a surface transverse to the mounting surface of suc-h support, with means securing said bearing on said surface of the bracket with capacity for adjustment of the bearing toward and from the support to suit the exact position of the line shaft to ether with a driven pllley aligned with t e driving pulley and spherical portion is seated, and a cap overit, the vblock mounted on a' portion of the bracket extending transversely of the shaft laxis and formed with an elongated slot 'to vpermit the aforementioned adjustment of said shaft bearing, 4,together with clamping bolts or'screws extending through the said slot and through said block engaging the bracket and the cap for holding said parts in adjusted relation.

4. In the combination defined in claim 1, I

the said bracket having an arm extending away from said shaft and formed with a,

slot extending in like direction, the bearing for the driven pulley being disposed below said arm but sup-ported in a frame or carrier having an upwardly 'extending arm lapped against the arm o f the bracket and formed with a rib engaging the said .y s1ot,. together with lamp screws holding saidarms together. v

5. In the combination defined in claim 1, said bracket having an arm extending away `from said shaft and formed with a Slot extending in like direction, the bearing for the driven pulley being disposed be`v threaded engagement with-.the aperture of one lug,while its head bears upon the other lug for tensioning a belt connecting the first and second pulleys.

In testimony whereof, I have hereunto set my hand at Chicago, Illinois, this 30 day of January, 1920.

HENRY KOCOUREK. 

